New guy here, considering fabrication of a first smoker. After looking at the offset smokers available from several well-respected manufacturers, there doesn't seem to be a model that "fits" (at a good price). I spent a couple weeks reading and going through Feldon's BBQ pit calculator, and came up with the following: -Cooking chamber is a 24"x62" (from a 150gallon propane tank) -Firebox is 1/4 inch steel with 1" ceramic insulation -5" stack with smooth 90 degree mandrel bend -6.5" from cooking grate to tuning plates -6.5" from tuning plates to bottom -Would be mounted on a skinny trailer I'd love to get some feedback on the dimensions, based on your real-world experience. -Anything that looks wrong? -Suggestions? (I'm set on a traditional,non RF design). -If I added a second cooking grate above the first, how much higher should it be? -Looks like the trailer mockup has ~9 cubic feet of wood storage. Think that'd last a couple 14 hour cooks?